I found my bantam cochin outside of the coup, after all the chickens had gone in to roost. It was dark, freezing and she was under the coup all puffed up. The coup is heated (with a heat lamp) so she obviously was too weak or sick to go into the coup with the rest of them. her eyes were closed and puffy (with a little red in the corners). Her face is reddish and she's all puffed up. I brought her in and she ate some scrambled egg. I'm keeping her inside for now. Thinking back, I have noticed that she's been puffed up lately (I figured she just didn't like the cold) and was mostly hanging out under the heat lamp in the coup for the past 2 weeks. I have a cold remedy. I put a drop or 2 on her food and she ate it and I swiped a little on her nostrils. Any suggestions of what this could be and if I'm doing the right thing?